title: Sterile gonads after removal of vegetative cytoplasm from the eggs of Bufo arenarum.
mesh_terms: D000818:Animals; D002022:Bufo arenarum / Q000196:embryology*; D003593:Cytoplasm / Q000648:ultrastructure; D005260:Female; D005835:Genitalia / Q000196:embryology*; D007246:Infertility / Q000196:embryology; D008297:Male; D010063:Ovum / Q000648:ultrastructure*